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["采购内容"]
["序号","材料名称","规格型号","备注"]
[1,"风化砂","/"]
[2,"瓜子料石粉","1:1混合料，瓜子料粒径5～10mm"]
[3,"碎石","粒径5cm-50cm"]
[4,"块石","粒径7cm-15cm/15cm-30cm"]